00997cam a22002531 4500 e 30000081 DLC 20260227111219.0 830721s1930 dcua 000 0 eng e 30000081 (OCoLC)29093629 DLC MnU OCoLC DLC premarc LC1045 .A25 no. 142 2d set. Cushman, Frank, 1879- Vocational training for airplane mechanics and aircraft engine mechanics: tentative partial analyses of the trades with suggestions relative to the organization and operation of training courses. [Washington, U.S. Govt. print. off., 1930]. viii, 45 p. diagrs. 23 cm. With : Granite cutting / George Albert McGarvey. Washington : Govt. Print. Off., 1929. Bound together subsequent to publication. DLC Mechanics (Persons) Airplanes. Klinefelter, Cyril Faivre, 1891- joint author. 21015 21015